Direct-connection high-temperature sealing centrifugal fan capable of improving heat preservation performance

Abstract

A direct-connection high-temperature sealing centrifugal fan capable of improving heat preservation performance comprises a volute, an impeller and a motor, an air inlet is formed in the side wall of one side of the volute, an output shaft of the motor penetrates through the side wall of the other side of the volute and is connected with the impeller, and an air outlet is formed in the side wall, in the radial direction of the impeller, of the volute. A front barrel and a rear barrel are arranged on the two sides, in the axial direction of the impeller, of the volute correspondingly, the front barrel sleeves the outer side of the air inlet, a front flange is arranged at the end, away from the volute, of the front barrel, a rear flange is arranged at the end, away from the volute, of the rear barrel, and a heat preservation assembly is arranged between the motor and the volute and sleeves an output shaft of the motor. The outer barrel, the inner barrel, the sealing cover plate and the heat preservation cover plate of the heat preservation assembly are matched to define an annular heat preservation cavity coaxial with the impeller, and heat insulation materials filled in the annular heat preservation cavity can improve the heat insulation effect. Good maintainability, sealing performance and heat preservation performance are achieved.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature sealed centrifugal fans, and in particular to a direct-drive high-temperature sealed centrifugal fan with improved heat preservation performance. Background Technology

[0002] In various industries such as environmental protection, kilns, and lithium batteries, fans are required to transport high-temperature media. To ensure that the transported media does not come into contact with the outside environment or to prevent the leakage of toxic gases, high requirements are placed on the sealing performance of the fans. To balance high temperature and sealing performance, current fan technology generally uses non-direct-coupled fans, with a sealing device installed at the front end of the main shaft to meet the on-site processing requirements. Non-direct-coupled fans have a large footprint and large overall dimensions, complex sealing device structures, and unavoidable mechanical wear, making installation and maintenance troublesome. Direct-coupled fans, on the other hand, have a direct connection between the motor and the fan impeller, resulting in a closer distance between the motor and the impeller. Although they have a simple and compact structure and small size, they require higher thermal insulation for the motor. Utility Model Content

[0003] The purpose of this invention is to provide a direct-drive high-temperature sealed centrifugal fan with improved insulation performance, thereby enhancing the maintainability, sealing, and insulation performance of the direct-drive fan.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a direct-drive high-temperature sealed centrifugal fan with improved heat preservation performance, including a volute, an impeller located inside the volute, and a motor for driving the impeller to rotate. The volute is set on a base, and the base is also provided with a bracket for installing the motor. An air inlet is installed on one side wall of the volute along the impeller axis. The output shaft of the motor passes through the other side wall of the volute along the impeller axis and is connected to the impeller. An air outlet is opened on the side wall of the volute along the impeller radial direction. A front cylinder and a rear cylinder are respectively provided on both sides of the volute along the impeller axis. The front cylinder and the rear cylinder are coaxially arranged with the impeller. One end of the front cylinder and the rear cylinder are respectively connected to the side wall of the volute. The front cylinder is sleeved on the outside of the air inlet. A front flange is provided at the end of the front cylinder away from the volute, and a rear flange is provided at the end of the rear cylinder away from the volute.

[0005] A thermal insulation assembly is provided between the motor and the volute. The thermal insulation assembly includes an outer cylinder, an inner cylinder, a sealing cover, and a thermal insulation cover. The thermal insulation cover is fitted onto the output shaft of the motor. One end of the thermal insulation cover is connected to the motor, and the other end is attached to the rear flange and connected by multiple bolts. The inner cylinder is fitted onto the output shaft of the motor, and the outer cylinder is fitted onto the outside of the inner cylinder. One axial end of both the inner and outer cylinders is connected to the side of the thermal insulation cover away from the motor. The other axial ends of both the inner and outer cylinders extend into the rear cylinder and are connected to the sealing cover. The outer wall of the outer cylinder is close to the inner wall of the rear cylinder, and the inner wall of the inner cylinder can be fitted onto the outside of the shaft end locking piece at the impeller end. The outer cylinder, inner cylinder, sealing cover, and thermal insulation cover cooperate to form an annular thermal insulation cavity coaxial with the impeller. The annular thermal insulation cavity is filled with thermal insulation material.

[0006] Preferably, the end face of the rear flange is provided with an annular sealing groove, the heat insulation cover is pressed on the opening side of the sealing groove, and a silicone rubber sealing ring is provided in the sealing groove.

[0007] Based on the above technical solution, the beneficial effects of this utility model are:

[0008] This invention features a heat insulation component between the volute and motor of a direct-drive centrifugal fan. The heat insulation component is fitted onto the motor's output shaft and extends into the rear cylinder of the volute. It is fixed by bolts connecting the heat insulation cover and the rear flange. The outer cylinder, inner cylinder, sealing cover, and heat insulation cover work together to form an annular heat insulation cavity coaxial with the impeller. The heat insulation material filled in the annular heat insulation cavity greatly enhances the heat insulation effect, preventing heat from the volute from reaching the motor. The sealing structure is simple and incorporates heat insulation design. The fan design is integrated, compact, low-cost, easy to install and disassemble, and has good maintainability, sealing performance, and heat insulation properties. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the axial direction of a centrifugal fan;

[0010] Figure 2 for Figure 1 The left view;

[0011] Figure 3 for Figure 2 A sectional view;

[0012] Figure 4 This is a schematic diagram showing the installation relationship between the volute and the insulation components.

[0013] The markings in the diagram are: 1. Volute, 2. Air outlet, 3. Base, 4. Bracket, 5. Motor, 6. Insulation cover, 7. Front cylinder, 8. Front flange, 9. Rear cylinder, 10. Rear flange, 11. Impeller, 12. Air inlet, 13. Outer cylinder, 14. Inner cylinder, 15. Sealing cover, 16. Sealing groove, 17. Insulation material. Detailed Implementation

[0014] Referring to the attached diagram, the specific implementation method is as follows:

[0015] like Figure 1-3 As shown, a direct-drive high-temperature sealed centrifugal fan with improved thermal insulation performance includes a volute 1, an impeller 11 located inside the volute 1, and a motor 5 for driving the impeller 11 to rotate. The volute 1 is mounted on a base 3, and the base 3 is also provided with a bracket 4 for mounting the motor 5. An air inlet 12 is installed on one side wall of the volute 1 along the axial direction of the impeller 11. The output shaft of the motor 5 passes through the side wall of the volute 1 along the axial direction of the impeller 11 on the other side and is connected to the impeller 11. An air outlet 2 is opened on the side wall of the volute 1 along the radial direction of the impeller 11.

[0016] like Figure 2-4 As shown, the volute 1 has a front cylinder 7 and a rear cylinder 9 on both sides along the axial direction of the impeller 11. The front cylinder 7 and the rear cylinder 9 are coaxially arranged with the impeller 11. One end of the front cylinder 7 and the rear cylinder 9 are connected to the side wall of the volute 1. The front cylinder 7 is sleeved on the outside of the air inlet 12. The end of the front cylinder 7 away from the volute 1 is provided with a front flange 8, and the end of the rear cylinder 9 away from the volute 1 is provided with a rear flange 10.

[0017] like Figure 2-4 As shown, a heat insulation component is provided between the motor 5 and the volute 1. The heat insulation component includes an outer cylinder 13, an inner cylinder 14, a sealing cover plate 15, and a heat insulation cover plate 6. The heat insulation cover plate 6 is sleeved on the output shaft of the motor 5. One end of the heat insulation cover plate 6 is connected to the motor 5, and the other end of the heat insulation cover plate 6 is attached to the rear flange 10 and connected by multiple bolts. Figure 4 As shown, an annular sealing groove 16 is provided on the end face of the rear flange 10. The insulation cover plate 6 is pressed on the opening side of the sealing groove 16. A silicone rubber sealing ring is provided in the sealing groove 16, which can seal the gap between the insulation cover plate 6 and the rear flange 10.

[0018] like Figure 2-4 As shown, the inner cylinder 14 is sleeved on the output shaft of the motor 5, and the outer cylinder 13 is sleeved on the outside of the inner cylinder 14. One end of the inner cylinder 14 and the outer cylinder 13 along the axial direction is connected to the side of the insulation cover plate 6 away from the motor 5. The other end of the inner cylinder 14 and the outer cylinder 13 along the axial direction extends into the rear cylinder 9 and is connected to the sealing cover plate 15. The outer wall of the outer cylinder 13 is close to the inner wall of the rear cylinder 9. The inner wall of the inner cylinder 14 can be sleeved on the outside of the shaft end locking member at the end of the impeller 11. The outer cylinder 13, the inner cylinder 14, the sealing cover plate 15 and the insulation cover plate 6 cooperate to form an annular insulation cavity coaxial with the impeller 11. The annular insulation cavity is filled with heat insulation material 17.

[0019] During installation, such as Figure 4As shown by the arrow, the insulation component is first connected to the motor 5. Then, as the motor 5 is axially connected to the impeller 11, it enters the rear cylinder 9 until the insulation cover 6 and the rear flange 10 are fitted together. Multiple corresponding bolt holes are pre-drilled on the insulation cover 6 and the rear flange 10. After the insulation cover 6 and the rear flange 10 are fixed by multiple bolts, the insulation component is connected to the volute 1 as a whole. At this time, the heat in the volute 1 needs to pass through the insulation component before reaching the motor 5. The heat insulation material 17 in the annular insulation cavity can greatly improve the heat insulation effect. The sealing structure is simple and takes into account the heat insulation structure design. The fan design is integrated, compact, low-cost, easy to install and disassemble, and has good maintainability, sealing performance, and heat insulation performance.

Claims

1. A direct-drive high-temperature sealed centrifugal fan with improved thermal insulation performance, comprising a volute (1), an impeller (11) located inside the volute (1), and a motor (5) for driving the impeller (11) to rotate. The volute (1) is mounted on a base (3), and the base (3) is also provided with a bracket (4) for mounting the motor (5). An air inlet (12) is mounted on one side wall of the volute (1) along the axial direction of the impeller (11). The output shaft of the motor (5) passes through the volute (1) along the axial direction of the impeller (11) and is connected to the impeller (11) on the other side wall. An air outlet (2) is opened on the radial side wall of the volute (1) along the impeller (11). The fan is characterized in that: The volute (1) is provided with a front cylinder (7) and a rear cylinder (9) on both sides along the axial direction of the impeller (11). The front cylinder (7) and the rear cylinder (9) are coaxially arranged with the impeller (11). One end of the front cylinder (7) and the rear cylinder (9) are connected to the side wall of the volute (1). The front cylinder (7) is sleeved on the outside of the air inlet (12). The front cylinder (7) is provided with a front flange (8) at the end away from the volute (1), and the rear cylinder (9) is provided with a rear flange (10) at the end away from the volute (1). A heat insulation assembly is provided between the motor (5) and the volute (1). The heat insulation assembly includes an outer cylinder (13), an inner cylinder (14), a sealing cover (15), and a heat insulation cover (6). The heat insulation cover (6) is fitted onto the output shaft of the motor (5). One end of the heat insulation cover (6) is connected to the motor (5), and the other end of the heat insulation cover (6) is attached to the rear flange (10) and connected by multiple bolts. The inner cylinder (14) is fitted onto the output shaft of the motor (5), and the outer cylinder (13) is fitted onto the outside of the inner cylinder (14). The inner cylinder (14) and the outer cylinder (13) are aligned axially. Both ends are connected to the side of the insulation cover plate (6) away from the motor (5). The other ends of the inner cylinder (14) and the outer cylinder (13) along the axial direction are both inserted into the rear cylinder (9) and connected to the sealing cover plate (15). The outer wall of the outer cylinder (13) is close to the inner wall of the rear cylinder (9). The inner wall of the inner cylinder (14) can be fitted onto the outside of the shaft end locking part at the end of the impeller (11). The outer cylinder (13), the inner cylinder (14), the sealing cover plate (15) and the insulation cover plate (6) cooperate to form an annular insulation cavity coaxial with the impeller (11). The annular insulation cavity is filled with heat insulation material (17).

2. The direct-drive high-temperature sealed centrifugal fan with improved thermal insulation performance according to claim 1, characterized in that: The end face of the rear flange (10) is provided with an annular sealing groove (16), and the heat insulation cover plate (6) is pressed on the opening side of the sealing groove (16). A silicone rubber sealing ring is provided in the sealing groove (16).

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